docs: def make_event_filter(self, filter_key, filter_value):
          """Create a new event filter."""
          event_filter = EventFilter(
              self.event_name,
              self.event,
              {filter_key: filter_value},
              from_block=self.from_block,
              to_block=self.to_block
          )
          event_filter.set_poll_interval(0.5)
          return event_filter